Biejing, China (CNN) -- Floods have killed at least 29 people in northeastern China this week and washed tons of chemical containers into the Songhua River, state media reported Friday.

The death toll from the flood waters in Jilin province rose to 27 in Yongji county. Two more people died in neighboring Shuangyang city, according to a statement from Jilin's civil affairs department, Xinhua news agency reported.

The flooding has forced more than 254,000 people from their homes and collapsed about 22,000 buildings, civil affairs said.

On Wednesday, the rising water hit a chemical plant in Jilin and 7,000 containers washed into the Songhua River -- 3,000 of which were filled with explosive chemicals, Xinhua said.